Subsoiler



Nov. 429, 192 7.

A. lc. LINDGREN sUBsoILERv Filed July 5. 1923 3 Sheets-Sheet l Nov. 29, 1927.

A. c. LINDGR: N

SUBSOILE R Filed July 5, 19225 5 Sheets-Sheet 5 I men/Z071 y jzexwf @Lijn/@13m Patented Nov. Z9, 1927.

siren STATES raton PATENT orifice.

ALEX'US C, LINDGBEN, CF ST. CHARLES, ILLINOIS, SSIGNR TO INTERNATIONAL HAR- VBE-STER 0011513511652', GF CHICAGO, ILLINOIS, A CORPORATION OF NEVI ERSEY.

sUBsorLER.

Application` filed July 5, 1923. Serial No. 649,428.

This invention relates to implements for plowing the sub-soil and is directed more particularly to improveinent'r in sub-soil plows designed to be pulled by a tractor.

rlhe principal object of the invention is to provide a sub-soil plow that can be readily controlled bythe operator of the tractor pulling the implement without necessitating his leaving his positionon the tractor, and with this in view a construction has been provided which embodies awheel-supported subsoiler standard which can be raised and lowered by mechanism controlled from'the tractor and which has means, also controllable from the tractor, for allowing the standard to swing away when any obstacle is met by the sub-soil tool in its course through the soil and means for thereafter returning the tool standard to working position automatically. Y Other objects of the invention are to provide Ya simple and eliicient implement of the type stated that will loosen the sub-soil without materially disturbing the surface and which has it parts so constructed and arranged as to transmit the draft power directly to and at a proper point on Ythe tool standard and providev maximum strength and economy of construction.

The invention accordingly resides in the organization and details of construction, or

the equivalents thereof, herein more par-Y ticularly described and claimed.

Referring to the annexed drawings@ Fig. 1 is a side elevation of a sub-soil plow constructed according Vto my invention;

Fig. 2 is a view from the rear of 'the line 2-2 of Fig. 1; Y Y

Fig. 3 is a detail plan view of theframe of the implement; v 1

Fig. l is a detail sectional view of a part of the latching mechanism;

Fig. 5 is a side elevation of the implement, similar to Fig. 1, but on a reduced scale and showing the tool standard and frame in raised position and also a modified form'of lifting mechanism; Y V Fig. 6 is a detail view showing the lifting connection of the modified form; and I m'Fig 7 is a partial side view showing the position of the tool standard after same has been released and the frame has traveled forwardly.A c

1n the `present instance, the construction embodying the Vinvention consists of vlongiat their front ends to each ot tudinally `extending frame members 10 which converge forwardly and are connected her and to a central longitudinally extending. frame bar 11 as by transverse bolts 12. Suitable means, such as a clevis 13., is provided on the forward ends of these bars for connection to the draw-bar of a tractor. These frame members are slightly bowed upwardly at the middle and at their rear ends/the frame members or bars 10 converge inwardly as at 10a, Fig. 3, and are then bent forwardly in spaced relation as at 10b until they engage the rearv end of bar y11 to the opposite sides of which they are vsecured as bybolt 14. Transverse lbraces 15 are provided oneach side of the frame between the outer portions of the frame members lOvand the forwardly vprojecting portions thereof, as best shown in Fig. 3. VThe` frame -is further strengthened by intermediate frame bars 16 which extend inwardly on each, side from the forward portions of the frame bars l() Vto the central bar 11 to which they yare rigidly secured and from which they then diverge slightly and then extend upwardly and rearwardly as at 1,Fig. 8, to a point substantially directly above the space 10b between the rear inlturned ends 10a of the main frame bars. At f vends by a transv rse shaft 2O on which the supporting wheels '21 are journaled.v Shaft QOhas its-ends journaled in brackets 20a on the ends of cranks 19EL and in connection with this shaft and wheelsthere is provided mechanism .for swinging the axle to raise `and lower the frame. lift device is shown for this purpose which comprises an intermittent clutch mechanism of a type well known in connection with with power lift implements and consisting essentially of a clutch member 21 rotating with the supporting wheel and an intermittently actuated clutch member Q2 ixed on the l.transverse axle and adapted to be locked to Y Vrotate with member 21 for a half revolution upon operation of spring pressed triprk mechanism i3 which carried on a bracket 2a In Figs. 1 and 2 a power y the trac-tor.

secured to the aXle and controlled by means of a cord or rod extending forwardly to The transverse shaft 20 is formed with a central crank 20bkto. whicl'i'is pivoted a centrally positioned lifting link 26, preferably formed of parallel bars, as shown in Fig. 2, which straddle thecentral bars 16a and are pivotally connected at'their upper ends to a depth adjusting lever 27 comprising a pair of spaced plates which are pivoted at 28 on the bars i6?. ln the present instance, the lever 27 is in the form of triangular plates having lone pivoted on ythe frame, a second `angle pivoted to the lifting` linlr 26 and the third angle connected to ,a rorwardly ,extenl .o" rod 29 provided with a cranlr 29a`at its .forward end and screw-threaded its rear .end for en@m Ue- 'D with the power lift clutch mechanism .ga, mentin a threaded collar lwhich is pivotally mounted between ,the plates at that point. NearY its forward end rod 29 is journaled in a supportingstandard 30 secured on the central'framebar ll. With the liftv mechanism just described, it vwill he seen that turning of -crank 292L will cause lever27 be ymoved on .its pivot in one direction or the other, thereby moving the lifting link 2G either up- Wardly or downwardly and correspondingly adjusting the supporting wheels to regulate the -depth of plowing. To entirely lower or raise the frame and tool standard, the clutch mechanism is thrown Vinto operation by a pull on cord 25, thereby causing a half revolution to be given shaft 20 and shift-ing the crank portion 2Ob thereof from upper to its lower position or vice versa, illustrated in Figs. l `and 2, this causing the axle cranks and wheels to be shiftedrin a manner to either raise or lower the fraiie. vis an alternative to use vof the power lift mecha` nism just described, a hand lift mecharnsm, as illustrated 'in flTig. 5, may loe used. This preferablycons'ists of the arcuate rack Si pivoted between plates 82 which fixed on the frame bars 16 at 3, a. Art the lol` er end of rack 3l the lif-tinglinlfA 2G is pivoted. Rack 3l cooperates with a worm pinion 33 l'iXed on the rod 29, which in thismodiiication, has its rear end journaled in a bearingk 841 formed on plates 32. lln this instance the lifting luik 26 1s connected to a shaft 3 5, Fig. 6, the equivalent of the shaft 20 heretofore described, but which is formed without the central crank shown in Fig.'

2, the clutch mechanism, etc. also being omitted. lVith this construction, it will be evident thatrotation of rod 29 will swing the arcuate rack 3l onits pi fot anl- -will effect either raising or lowering of the e in much t nesame manner, but not as quicl" y,

which is, therefore, preferred. 4

Between the rear yends of the mer' l'il there is plvotallyl supported to s 4 rearwardly a tool carrying standard which there is provided a'knife edge or colte'r blade 38 which may be detachably secured to the standard 36. intermediate its ends,Y

.the standard 36 has secured thereto at a point below the frame a forwardly progecting loop or eye 39 which forms a coupling member cooperating with a combined draft andlatch ber l() positioned centrally of .the frame and pivoted its forward end as at 'el on the centrali/traine bar lil, rlhe interlocking or latch portion of ydraft bar 4:0 consists of a hook or bill lOa designed to interloclrwith the eye 39 and formed with a .beveled .Or slopingv head 40h designed to engage with and ride over the eye 89 when engaged thereby. The bar 40 is supported in properiposi-- tion by a vertical bar l2 that has a forked lower end 42a, the arms of which stra-delle and rest on the central .frame member' and are pivoted to the draft bar 40, as beSt Seen in Fig. 2. At its upper end, bar V412 is pivoted to one arm of-a. bell-crank lever 43 pivoted en the frame, to the other of lwhich there is attached an operating cord bar 40, thereby releasing the latch and leavy ing standard 8G free to swing rearwardly onv the pivot supporting its upper end. The relation of the draft bar l0 to the standard and vframev is such that 'the pull applied directly to and low down on kthe standard The implement construct-ion es above vdescribed operates in the following manner. When the frame lifted for transport, as in Fig. 5, it tilts towards the front and the standard 36 will tend to swing-into sub stantially upright position and be locked in the slot l0a by the latch mechanism .described above. VVhen it is desired to lower the vtool to working position, the lift mechanism is operated to shift the V,cranks and the 'frame and beam thoreupc. assume'the positions shown in liig. l with the subsoil tool buried beneath the surface.v lf,during progress of the implement, an obstacle.. Vsuch a stone, is encountered by the tool andlf; implement becomes stalled, the released pull on cord #le and fori travel Vof the implement is resumed, where-Y uponA standard 236 .mi i its pivot until the tool practically out f the ground, as shown in Fig. '7., .llt this time, or at any time after releasing the standard, the lift mechanism is operated to Ae e 39 will enoaoe the shoulder 40h which D b will ride over the eye until the hook l()EL dropsF into interlocking position therein and again locks the standard in upright position.

If the frame is then again lowered, t-he tool reeenters the ground and operation is resumed.

The provision ofvmeans for releasing the ltractor pulled upright tool standard when necessity arises, inconnection with means for raising the frame and automatically returning the standard to normal position forms the gist of my invention, resulting in a tractor subsoiler of novel form that is correct in construction, easily controlled and capableof meeting all requirements of e'liicient operation.

The construction above described exemplilies the preferred form of my invention but modifications thereof can obviously be made within the scope of thefollowing claims.

I claim as my invention:

l. A sub-soil plow comprising a wheeled frame, a normally upright subsoiler standard pivotally connected at its npper end with the frame so as to be swingable in the line of travel of the plow, a latch device mounted on the frame in a position below the point of pivotal support of said standard for detachably maintaining the standard in its normal upright position, said latch device also constituting a' means for applying draft to the standard, means for raisingvand lowering the frame, and vmanually operable means for releasing the latch when the frame is in lowered position to thereby allow the standard to swing rearwardly as the plow advances and to return to normal position by gravity when the frame is thereafter raised. v

2. A sub-soil plow comprising [a wheel supported frame, a tool carrying standard pivotally associated at its upper end with said frame, means mounted on theframe for normally locking the standard in upright position, said frame having parts spaced so as to provide a longitudinally extending slot engaging the sides of the standard, said frame parts slidablyengaging the standard intermediate the locking means and the pivot of the standard, means for raising and lowering the frame, manually operable devices for releasing the locking means, and means for effecting remote controlof said means, both said locking means'being so constructed and arranged with reference to the point of pivotal support of the standard that the standard. is automatically re-loclred to the frame when the plow advances with the frame `in raised position subsequent to a vrelease of the locking means. y

3. A sub-soil plow comprising a frame, a U-shaped crank axle having its bight portion journaled in the frame, supporting vwheelsat the ends of the crank axle, a shaft supported by said wheels and extending between the cranks of said axle and the wheels, an upright subsoiler standardhaving its upper end pivoted to theframe so as to swing rearwardly, a latch device on the frame for engaging the standard bel'ow its pivot'for ylocking the. standard in upright position,

rmeans connecting the frame with said shaft for swinging thefaXle cranks toraise yand lower y,the frame, manually operable and re4 mot'ely controlled means for releasing saidV latch to permit the standard .to swing rearwardly as the plowv travels forwardly, and means including the latch device for automatically re-locking the standard in upright position as it swings forward by' gravity when the frame in raised.

4. A sub-soil plow comprising a wheel supported frame, Yan uprightV subsoiler standard pivoted at" its upper end to the frame so as to swing rearwardly therefrom, said frame includingparts latterally spaced to form a slot for slidably receiving an intermediate part of the standard when the latter is in an upright position, and a draft coupling on the frame including a releaseable latch connected to the standard 'intermediate its ends for normally retaining the standard in said slot.

5. In a sub-soil plow the combination of a vertically movable frame, means for raising and lowering the frame, a normally upright subsoiler standard pivoted at its upper end on the frame to swing in the line of travel, said standard having an intermediate portion slidably interfitted between portions of the frame, releasable means for locking the standard in Vnormal position,said standard swinging rearwardly out of the soil under the influence of forward travel when released, and gravity actuated means effecting automatic relooking ofthe standard in norymal position as the frame is raised.

6. In a tractor sub-soil plow, the combination of a frame adapted to be hitched to a fixed point on a tractor, means for lifting and lowering the frame on said hitch point, a normally vertical standard 'pivoted at its upper end to the frame and having its lower end positioned to *engage in the soil when the frame is down and be free thereof when the framegis up, a draft connection including automatic coupling means connect ing the lower portion of the standard to the frame, means for 4releasing the coupling upon meeting obstructions lthereby causing the standard to yswing rearwardly through continued forward travel of the frame, said means for lifting the frame onits hitch point constitigiting means for ietumnne the standard to coupled relation Wit-h the draft Conv nection by Causing forward Swing of the Cil standard by gravity to normal raised tree .of the soil.

7, In a tractor sub-soil plow, the combination of a frame having a fear elevated'portion and adapted at its ylower forwaid portion to be hitehed'to a fixed point on a tractor, means for lifting and loweing; the frame on said hitch point7 a normally vertie l ftndposition when kard pivoted at its-upper end to theelevated portion of said frame and havin@A n@ its loWei :end positioned to engage the soilvwhen the lframe is down andbe free thereof when the frame isy up7mean$ onthe frame `for bracing the standard against lateral v-niovennent, a draft connection including automatic conpling mea-ns Connecting the lowei portion of the Standard with the forward portion of the traine, means for releasing the coupling upon meeting obstruction thereby Causing the standard to ewino' ieawardly through continued A"'ofwaid travel of the frame, Said means for lifting the fiame on `its-hitch point constituting' means for returning the v ALEXUS LINDGVRENf 

